Strain-insulator provided with detachable and adjustable arcing means.



L. STEIN BERGER. STRAIN INSULATOR PROVIDED WITH DETACHABLE AND ADJUSTABLE ARCING MEANS- APPLICATION FILED uov.14. 1916.

1,270,457. Patented June 25, 191%;

2 SHEETS-SHEET l.

A ATTORNEY L. STElNBERGER.

STRAIN lNSULATQR PROVIDED'WITH DETACHABLE-AND ADJUSTABLE ARCING MEANS.

APPLICATION FILED NOV. 14. 1916.

Patented June 25; 1918.

2 SHEETS-SHEET 2.

V INVENTOR -Kings, city and State of New UNITED STATES PATENT OFFICE.

LOUIS STEINBEBGEB, OF BROOKLYN, NEW YORK.

srmm-msumron PROVIDED WITH DETACHABLE AND ADJUSTABLE ARCING MEAN S.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed November 14, 1916. Serial No. 131,219.

My invention relates to insulators for the support and insulation of electric conductors employed for many purposes such as wireless telegraph and telephony and in various kinds of e ectric power and electric.

power transmission and especially constructed for use in connection with currents of very high voltages and very high frequencies.

To these ends, my particular, object is to improve the construction of such insulators, so as to render'them proof not only against the destructive effects of high frequency currents. but also against the destructive eifects of lightning;

Another object is toprovide a strain insulator in combination with an arcing means which -co-act, to reduce to a minimum the possibility of destruction by currents of high frequency passing over the line. Another object is to provide an arcing means in combinatio with a strain insulator so as to reduce o a minimum the liability of the destruction of the insulator by lightning.

Another object is, to provide an insulator with an arcing means which is readily detachable therefrom.

Another object is to construct the arcing means so that when placed in position upon the insulator, both poles remain securely held-in a single plane passing through a fixed diameter of the insulator.

Otherv objects will appear from the subjoined description and claims.

Referring to the drawings;

Figure 1 is a vertical longitudinal section of an insulator, on a plane passing through the insulating material and the strain members, the exposed portion of one of the strain members being shown in elevation. v

Fig.2 is an end elevation of an insulator, a portion of the insulating material being broken away. 7

' Fig. 3 is an end elevation of oneform of a detachable and adjustable arcing member.

and 13 Fig. .4 is a side view of the insulator body showing in dotted lines the position taken by the embedded portions of the strain members. v

Fig. 5 is a vertical longitudinal section upon a plane passing through the insulating material, and the strain members, the exosed portion of one of the strain members 'eing shown in elevation, and also shown in dotted lines in its disconnected position, the

arcing means being of amodified construction from those shown in Fig. 1. V

Fig. 6 is a plan view of a strain member provided with an integral arcing pole member as shown in Fig. 5.

Fig. 7 is an end view of a modified form of a detachable arcing member shown in Fig. 5. v Fig. 8 is, a similar view of the detachable arcing member of a different form from that shown in Fig. 7.

In the drawings in which like reference characters refer to like parts;

Referring especially to, Figs, 1, 2 and 4; 10 is the central or body portion of the insulator, the surface of which is provided as shown, with a plurality of annular grooves 11 forming portions of enlarged diameter 12 at either end of the insulator body and another portion 14 at substantially the center of the insulator-body. Strain members l5 and 16 are partially embedded in the body of the insulator and interlock with each other, and each member is situated re spectively in planes which are substantially at right angles to each other. The strain member 15 is a single integral piece provided with a cross bar 15 and is formed in the shape of a chain link. The other strain member 16 is formed in two separate yokeshaped parts 17 and 18 which may of course be V-shaped, Ushaped,'staple-shaped or any 'other shape which may be generically described as yoke-shaped. One of these parts 17 is embedded in the insulating material and is interlocked with the integral strain member 15, the arms of said part 17 projecting a short distance from the body of the insulator as at 19 and 20. The arms 21 and 22 of the other yoke shaped member 18 are removably secured to 'the arms of the embedded portion by any suitable means, preferably a screwthreaded constructionhereinafter described. Screw-threads 23 and 24 are formed around the projecting end ortions of the embedded member 17. pon

the end of one of the arms of the exposed portion 18 of the strain member is a central cavity 25 having screw-threads 26 cut in its inner surface, ofsuch size and arrangement as to engage with the screw-threads 23 of one of the projecting ends of the embedded portion of the strain 'member. Screwthreads 27 are also out upon the outer end of the other arm of the removable portion of the strain member and a screw-threaded sleeve 29 fits over the same and engages therewith by a screw-threaded connection. The sleeve 29 has screw-threads 28 formed in the surface of its central opening and the screw-threads of the sleeve also operatively engage with the screw-threads 24 on the projecting portion 20 of one of the arms of the embedded strain member.

By means of this construction, the outer yoke shaped portion of the strain'member can readily be disconnected. from the portion which is embedded in the insulating material by unscrewing the sleeve 29 from the fixed arm of the embedded portion of the strain member and then unscrewing the two portions of the strain member from each other. During this operation, the sleeve 29 and the outer removable portion of the strain membertake the position shown in dotted lines in Fig. 5, or it may be entirely removed therefrom by continuing .the nn' screwing operation.

30 and 31 are insulating portions projecting from one side of the insulator which surround the arms of the embedded strain member. 34 and 35 are insulating portions projecting from the opposite side of the body of the insulator which surround the projecting arms of the integral strain member which is embedded in the body of the insulator. a

The body portion of the insulator into which the strain members are embedded is of substantial thickness.

The arcing means consist of two members 40 and 41. The member 41 is preferably mounted in a fixed position by a screwthreaded projection 42 cooperating with a screw-threaded cavity 43 in the center of the cross bar 15 of the integral strain member 15. The upper end of the arcing member 41 is preferably shaped into a round head 44 of hardened metal to form one pole of the arcing means. The other and co;- operating arcing member 40 consists of a bridge portion 45 provided at. its end with an opening 46 of a shape which is similar to but a little larger than the shape of the projecting end of the embedded portion 17 of the strain member 16. Another opening 47 is provided at a proper distance from the opening '46 also of the shape similar to but a little larger than the other projecting end of the embedded portion of the strain member 16.. The two openings are so ar- "ing 61 therein of any suitable shape other in cross section as the shape of the opening ranged that the arm may be fitted over both projecting ends of the embedded strain member and held securely in place by means of the sleeve 29 and the screw-threaded end 25 of the removable member 18. Extending from the supporting frame 45 is a curved or V-s haped arm 48 as indicated in Fig. 1, the free end of which is bent over the body of insulating material and is provided with a screw-threaded cavity 49. A pole member 50 with a screw-threaded shank 51 and a round end 52 of hardened steel is secured in the end of the arm 48 by screwing the shank of the pole member into the screwthreaded cavity. A look nut 53 is mounted upon the screw threaded shank so as to hold the pole member in its adjusted position.

By reason of the fact that the supporting arm of the arcing member 40 is bridged between the projecting ends of the embedded portion of the strain member, the arcing member is readily secured on and removed from the insulator, and when it is assembled it is held in a fixed position, and cannot be turned from that position with respect to the insulator proper. The pole members of the arcing means can be readily adjusted to any position relative to' each other and can bezremoved and remounted at any time .of the strain member, and is mounted thereon so as to remain in a fixed position relative to thebody of the insulator.

To accomplish this result, one end of the arcing member6O is provided with an openthan circular, but which is of a size and shape to nicely fit over one .of the projecting ends 62 of the embedded portion of the" strain member.

The projecting end is of the same shape 61 in the arcing member 60. A very practical way to fit the arcing member over the end of the projecting arm of the strain member, is to cut a sector as at 63 from one side of the normally round projecting arm, and

to provide a sector of metal 64 across the otherwise circular opening in the end of the arcing means. It is obvious therefore that the arm of the arcing means will be held in a fixed plane when it is mounted on the insulation.

The arcing member 60 is otherwise shaped like the arcing means 40 heretofore described in connection with Fig. 1, and is likewise provided with an adjustable and re- 1 movable pole member as heretofore described.

In Fig. 5, I have illustrated an insulator body of different form from that shown in Fig. 1, as the form shownin Fig. 5 the surface of the insulator body is provided with a stepped formation. I do not limit myself however, to any particular configuration of the surface of the insulator body, but an insulator body of suitable size and surface configuration may be used to advanta e.

. t is to be particularly noted that the pole members of the arcing means are so position'ed with respect to each other, that while they-may be properly spaced apart to insure the retention of the full insulating value of the body of the insulator, yet they can be so adj'usted that the distance between them will be -such as to permit an arc to be formed when the. limit of safety of the insulator bodyfis reached.

The strain members are constructed preferably of metal, and the insulating portion of my device may be made of any approved insulating material, but I prefer to use in this "co struction, a material known in the art as Electrose.

It is to be understood that I do not limit myself to the particular shape or form of any part shown, neither do I limit myself to the precise arrangement ofthe parts with respect to each other; neither do I limit myself, as above stated to any particular insulating material.

It is to be understood that the above description and drawings are merely illustrative and that the invention is not to be limited in any respect except as defined in the sub-joined claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is v 1. An insulator provided with arcing pole members secured respectively to supports on the opposite sides of the insulator body, said ole members being mounted for bodily adustment to and from each other.

2. An insulator provided with a detachable arcing member havin an extensible pole member detachably and adjustably secured thereto.

3. An insulator provided at one side thereof with a strain member having thereon an integral arcing pole member and a removable arcing pole member at the other side thereof provided with an extensible pole member adjustably and removably secured thereto.

4. An insulator provided with, arcing -adjusting the relative members, the respective poles of which are secured by screw threaded adjustment to supports mounted on each side of the insulator.

5. An insulator provided with a strain member, and an arcing member, the pole member of which is removably secured thereto for bodily adjustment.

6. An insulator provided with arcing members, which are bodily adjustable relatively to and from each other. I

7. An insulator provided with a strain member partially embedded therein, an arcing member, the frame portion of which is rigidly but removably secured to the projecting portion of the strain member and a separate and independent pole member adjustably and removably mounted thereon.

8. An insulator having a body portion of insulating material, a strain member partially embedded therein, an arcing member provided with an opening in one end to closely fit the projecting portion of the strain member, means for preventing an axial movement of the arcing member with respect to the strain member, and a bodily removable pole member adjustably mounted thereon.

9. An insulator having a body portion of insulating material, strain members partially embedded in the body portion and projecting respectively from each side thereof, arcing means consisting of a pole member on one of the strain members and another pole member bodily removable there from and adjustably supported upon a frame removably secure to the other strain member. I

10. An insulator having a body portion, arcing means consisting of two pole members r spectively secured to supports upon each side of the body portion and means for bodily moving the pole members to and from each other.

11. An insulator having a body portion, arcing means consisting of two pole members respectively secured to supports on each side of thebody portion and means for positions of the pole members by bodily movement to and from each other.

the respective pole mbmbers of Signed at the borough of Manhattan, city,

LOU-IS STEINBERGER.

In presence of ISABEL R. RICHARDS, ETHEL D. BARON. 

